Improvement in materials for bearing-surfaces in machinery



time sate we dffim JOHN SGHIEDER; on NEW YORK, 'N. Y.-

Lettcrs Patent No. 110,163, dated December 13, 1870.

" IMPROVEMENT IN MATERIALS FOR eEARme-suRFA'cEs m MACHINERY.

The Schedule referred to in these Letters Patent and making part of the same.

i To dilwhom it may concern Be it known thatvI, J OHN Sonmnnn, of the city,

county, and State of New York, hare invented a new and improved Oompoundfor Bearing-Surfaces in Machinery; and I do hereby declare the following to be afull,'clear, and exact description thereof, which will enable those skilled in the art to make and use the same.

' This invention relates to a compound which is prepared by boiling vulcanized India rubber in a mixture of powdered coal and alcohol;

1n carrying out myinvention I take coal, reduced to fine'powder,'-one pint; alcohol, one half pint; water,'one-halt" pint. 7

These ingredients I place iii a kettle or boiler, of any desired form or shape, and, after they have'been thoroughly mixed with each other, I iutroducethe India rubber, and boil the same in the mixture fortwo hours, (more or less, according to the thickness of the rubber.) By the action of the heat and of the alcohol, the powdered coal is caused to penetrate to a certain depth into the rubber, and, if the rubber readily reduced to a fine powder by stamping or grinding.

What I claim as new, and uesire to secure by Letters Patent, isy A compound for bearing-surfaces of machinery, pie pared substantially as described.

This specificationsigned b me this 25th day of November, 1870. I

' JOHN SGHIEDER.

\Vitnes'ses W. HAUFF, E. F. KASTENHUBER. 

